UninstallKernelTest.php

<?php

namespace Drupal\Tests\system\Kernel\Installer;

use Drupal\KernelTests\KernelTestBase;

/**
 * Tests the uninstallation of modules.
 *
 * @group Module
 */
class UninstallKernelTest extends KernelTestBase {
  
  /**
   * Modules to enable.
   *
   * @var array
   */
  public static $modules = [
    'system',
    'user',
    'field',
    'file',
    'image',
    'media',
  ];
  
  /**
   * {@inheritdoc}
   */
  protected function setUp() {
    parent::setUp();
    $this->installSchema('user', [
      'users_data',
    ]);
    $this->installEntitySchema('media');
    $this->installEntitySchema('file');
    $this->installConfig([
      'media',
    ]);
  }
  
  /**
   * Tests uninstalling media and file modules.
   */
  public function testUninstallMedia() {
    // Media creates a file field that is removed on uninstall, ensure that it
    // is fully deleted (as it is empty) and that file then can be uninstalled
    // as well.
    \Drupal::service('module_installer')->uninstall([
      'media',
    ]);
    \Drupal::service('module_installer')->uninstall([
      'file',
    ]);
  }

}